{% assign series = site.categories.[series_list] %}
{% if series.size > 0 %}
<h2>"{{ series_list }}"系列文章:</h2>
<ul>
{% for node in series reversed %} 
  {% if page.url == node.url %}
  <li>{{ node.date | date: "%Y-%m-%d"}} {{node.title}}</li>
  {% else %}
  <li><a href="{{node.url}}">{{ node.date | date: "%Y-%m-%d" }} {{node.title}}</a></li>
  {% endif %}
{% endfor %}
</ul>
{% endif %}
{% assign series = nil %}
{% assign series_list = nil %}
